摘要
用蒸汽喷射作为提升液体的动力,在1.5m长的管内实现了稳定的升膜蒸发,并对该升膜两相流动及传热进行了实验研究和理论分析.研究结果表明,蒸汽喷射对蒸发传热有一定的强化作用,以蒸汽喷射作为提升动力的经济性可以接受.考察了蒸汽喷射升液膜的流动及蒸发传热机理,建立了环状流传热模型,考虑了膜流动界面波的影响.模型计算值与实验值吻合较好.
Steam nozzles were used to pump liquid in a climbing - film evaporation experimental system. In fact, a jet was formed by the nozzle and an evaporation tube. Two phase flow and heat transfer of climbing- film evaporation with steam injection pumping were studied experimentally and theoretically. The experimental results showed that steam injection enhanced heat transfer of evaporation and only a small amount of steam was consumed for pumping. A heat transfer model was presented, in which effects of interfacial wave on heat transfer were considered. The model was found in good agreement with the experimental data.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1994年第6期678-685,共8页
CIESC Journal
基金
国家自然科学基金资助项目
关键词
蒸汽喷射
升膜蒸发
环状流
两相流
传热
steam injection, climbing-film evaporation, annular flow, heat transfer of two phase flow
